Excel and Google Sheets have three functions to calculate the internal rate of return: IRR, XIRR, and MIRR. Learn how these functions can calculate investment returns.

Use Microsoft Excel to calculate EBITDA (earnings before interest, tax, depreciation, and amortization) profit margin.

Learn how to change the default file format for saves in Word, Excel, and PowerPoint, so that you do not need to change it every time.

If Microsoft Excel opens a Blank screen when you open an existing file, then you can stop Excel from opening a Blank workbook or sheet.

This inflation calculator uses the change in the Consumer Price Index (CPI) from 1913 to 2025 to estimate the U.S. dollar's buying power and future value.